For minor plugins, like a spam honeypot, I tend to take the Storm Trooper approach: “Door’s locked, move on to the next one.” Hoop #1 is the license. Hoop #2 is not being able to get said license. Hoop #3 is the adamant assertion that help will not be provided on WP site; need to get an account on the dev’s (not fully functional) website. That’s a lot of hoops to encounter in the first two minutes and feels like a lock out. I had a “poor” experience using your plugin, and that is what 1 star equates to, as described in the tooltip text.
Turns out you are actually providing support here. Okay, let’s see. Yep, I was able to add it to the cart. I’m actually no longer interested in the plugin and so not continuing further. If I end up reconsidering it in the future, I will change my rating based on that experience.